Niacinamide in Haircare

What is Niacinamide?

Niacinamide, also known as nicotinamide, is a prominent form of vitamin B3 (niacin), an essential water-soluble vitamin. Unlike nicotinic acid, another form of vitamin B3, niacinamide does not cause the "niacin flush," a temporary redness and itching sensation. It is a precursor to the coenzymes nicotinamide adenine dinucleotide (NAD+) and nicotinamide adenine dinucleotide phosphate (NADP+), which play fundamental roles in over 400 biochemical reactions in the body, including cellular energy metabolism, DNA repair, and antioxidant defense mechanisms.

In haircare, niacinamide is valued for its versatile effects on both the scalp and hair fiber. It is recognized for its stability and ability to penetrate the stratum corneum, the outermost layer of the skin, making it an effective topical ingredient.

Origin and Chemistry

Naturally present in various foods such as yeast, meat, fish, milk, eggs, green vegetables, and fortified cereals, niacinamide can also be synthesized. Chemically, it is an amide of nicotinic acid. Its molecular structure allows it to interact with various biological pathways, particularly those involved in cellular signaling and enzymatic reactions.

How Niacinamide Benefits Hair and Scalp

Niacinamide's actions are multifaceted, primarily benefiting the scalp environment to support healthy hair growth and improving the overall condition of the hair shaft.

Scalp Health

Niacinamide strengthens the skin barrier function of the scalp. It promotes the synthesis of ceramides and other epidermal lipids, which are crucial for maintaining the integrity of the stratum corneum. A robust scalp barrier is vital for protecting against environmental aggressors, reducing transepidermal water loss (TEWL), and preventing irritation. This improved barrier function can alleviate symptoms associated with a dry, itchy, or sensitive scalp.

It also exhibits anti-inflammatory properties, which can help to soothe an irritated scalp. By modulating inflammatory responses, niacinamide can reduce redness and discomfort, creating a more conducive environment for hair follicles.

Furthermore, niacinamide has been observed to improve blood circulation to the scalp. Enhanced microcirculation ensures that hair follicles receive an adequate supply of oxygen and nutrients, both of which are essential for optimal hair growth cycles.

Hair Fiber

While its primary benefits are scalp-centric, niacinamide can indirectly improve hair fiber quality. A healthier scalp environment promotes the growth of stronger, more resilient hair strands. Some studies suggest it may help improve hair elasticity and reduce breakage by contributing to overall hair health from the root.

Niacinamide Benefits

• Strengthens Scalp Barrier: Niacinamide enhances the production of ceramides, which are essential lipids for maintaining the scalp's protective barrier. This helps reduce moisture loss and protects against environmental damage, benefiting those with dry or sensitive scalps.
• Reduces Scalp Inflammation: It possesses anti-inflammatory properties that can soothe an irritated or itchy scalp. By calming inflammatory responses, it creates a healthier environment for hair growth, particularly helpful for individuals experiencing scalp discomfort.
• Improves Scalp Circulation: Niacinamide can promote better blood flow to the scalp. Increased circulation ensures that hair follicles receive more oxygen and vital nutrients, supporting the hair growth cycle and benefiting those with sluggish hair growth or thinning hair.
• Regulates Sebum Production: It helps to balance sebum (oil) production on the scalp. This can be beneficial for individuals with oily scalps, reducing greasiness and preventing conditions that can impede hair health.
• Enhances Hair Resiliency: By fostering a healthier scalp and supporting strong hair follicle function, niacinamide indirectly contributes to the growth of stronger, more elastic hair strands, making them less prone to breakage.
• Supports Hair Growth Cycle: Through its roles in cellular energy and nutrient delivery, niacinamide helps optimize the anagen (growth) phase of the hair cycle. This can lead to decreased hair shedding and improved hair density for those experiencing general hair thinning.

Who Benefits Most?

Individuals experiencing the following conditions are most likely to benefit from niacinamide in haircare:

• Dry or Itchy Scalp: Due to its barrier-strengthening and anti-inflammatory effects.
• Sensitive Scalps: Its soothing properties help reduce irritation.
• Oily Scalp: Niacinamide can help regulate sebum production.
• Thinning Hair: By improving scalp health, circulation, and supporting the hair growth cycle.
• General Hair Health Maintenance: For anyone looking to maintain a healthy scalp and promote strong hair.

Who Should Avoid Niacinamide?

Niacinamide is generally well-tolerated. Allergic reactions are rare but possible, as with any ingredient. Individuals with known allergies to vitamin B compounds should consult a healthcare professional. There are no widespread contraindications for topical niacinamide use in haircare.

Common Concentrations

Topical niacinamide is typically found in haircare products at concentrations ranging from 0.5% to 5%. Higher concentrations, up to 10%, are sometimes used in targeted scalp treatments. Effective results are often observed at concentrations of 2% to 5% for its scalp benefits.

Safety and Regulatory Notes

Niacinamide is recognized as a safe and effective ingredient for cosmetic use. It is non-irritating and non-sensitizing for most individuals. Regulatory bodies worldwide classify it as safe for use in over-the-counter cosmetic and personal care products. No significant safety concerns have been reported with its topical application at typical concentrations.

Product Categories Where it Appears

Niacinamide is incorporated into a variety of haircare products designed to address scalp concerns and support hair health:

• Shampoos and Conditioners: Often included for daily scalp health maintenance and to deliver its benefits with regular washing.
• Scalp Serums and Treatments: These typically contain higher concentrations for targeted delivery and intensive care for specific scalp issues like dryness, irritation, or thinning.
• Hair Growth Treatments: Due to its ability to improve scalp circulation and support the hair growth cycle.
• Leave-in Conditioners and Tonics: Provides continuous benefits to the scalp and hair throughout the day.
• Hair Masks: Infused into masks for deeper penetration and treatment of both the scalp and hair.

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Find these ingredients in Watermans products

• Niacinamide — you will find this ingredient in our Hair Mask.

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Did you know?

• Niacinamide is a water-soluble vitamin, meaning it is not stored in the body and must be replenished regularly.
• As a B vitamin, niacinamide plays a crucial role in cell metabolism and energy production throughout the body.
• Historically, niacin deficiency led to pellagra, a disease with symptoms including dermatitis, diarrhea, and dementia.